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• Catalogue level

  Piece

  The History of Hut 8 by A P Mahon

  The History of Hut 8 by A P Mahon

  Held by

  The National Archives, Kew

  Date

  1939 Jan 01-1945 Dec 31

  Reference

  HW 25/2

• Catalogue level

  Piece

  ENIGMA machine - early history (written after the event). H R FOSS: Reminiscences...

  ENIGMA machine - early history (written after the event). H R FOSS: Reminiscences on the ENIGMA machine. N de GREY: ENIGMA history

  Held by

  The National Archives, Kew

  Date

  1949 Sep 30-1949 Oct 31

  Reference

  HW 25/10

• Catalogue level

  Piece

  Early correspondence relating to the ENIGMA cypher machine, including the patent...

  Early correspondence relating to the ENIGMA cypher machine, including the patent specification and photographs

  Held by

  The National Archives, Kew

  Date

  1924 Jun 02-1936 Mar 25

  Reference

  HW 25/6

• Catalogue level

  Piece

  Dossier on Polish Liaison - summaries of various documents relating to the Polish...

  Dossier on Polish Liaison - summaries of various documents relating to the Polish contribution to the solution of ENIGMA

  Held by

  The National Archives, Kew

  Date

  1920 Jan 01-1941 Oct 16

  Reference

  HW 25/15

• Catalogue level

  Piece

  Later reports cover air support to the Italian push from Libya into Egypt

  Later reports cover air support to the Italian push from Libya into Egypt

  Held by

  The National Archives, Kew

  Date

  1940 July 10-1940 Sept 21

  Reference

  HW 21/25

• Catalogue level

  Piece

  Solution of German Teleprinter Cyphers (Testery) Linguistic Methods

  Solution of German Teleprinter Cyphers (Testery) Linguistic Methods

  Held by

  The National Archives, Kew

  Date

  1941 May 01 - 1945 Sep 30

  Reference

  HW 25/28

• Catalogue level

  Piece

  Miscellaneous teleprinter messages to and from CBME

  Miscellaneous teleprinter messages to and from CBME

  Held by

  The National Archives, Kew

  Date

  1941 Sep 01 - 1943 Jun 13

  Reference

  HW 51/25

• Catalogue level

  Piece

  Decrypts of Japanese army and army air force messages

  Decrypts of Japanese army and army air force messages

  Held by

  The National Archives, Kew

  Date

  1944 Oct 01-1945 Feb 28

  Reference

  HW 52/25

• Catalogue level

  Piece

  A technical description of COLOSSUS I by D C Horwood, dated August 1973

  A technical description of COLOSSUS I by D C Horwood, dated August 1973

  Held by

  The National Archives, Kew

  Date

  1942 Jan 01 - 1945 Dec 31

  Reference

  HW 25/24

• Catalogue level

  Piece

  Italian Mission correspondence and notes. Catty's Cypher Security Mission in Rome...

  Italian Mission correspondence and notes. Catty's Cypher Security Mission in Rome to oversee Italian usage of diplomatic cyphers

  Held by

  The National Archives, Kew

  Date

  1945 Jan 10 - 1945 Aug 22

  Reference

  HW 53/25

• Catalogue level

  Piece

  Monthly reports issued by the headquarters of the RAF Middle Eastern Wireless Service...

  Monthly reports issued by the headquarters of the RAF Middle Eastern Wireless Service concerning enemy air activity in the Mediterranean, North Africa and the Middle East

  Held by

  The National Archives, Kew

  Date

  1943 Jan 01-1943 Mar 01

  Reference

  HW 41/25

• Catalogue level

  Piece

  Czech transmitters in UK

  Czech transmitters in UK

  Held by

  The National Archives, Kew

  Date

  1942 Aug 27-1945 Jul 03

  Reference

  HW 34/25

• Catalogue level

  Piece

  DF Subcommittee - minutes of meetings and related correspondence

  DF Subcommittee - minutes of meetings and related correspondence

  Held by

  The National Archives, Kew

  Date

  1942 Jan 30-1945 Jun 23

  Reference

  HW 42/25

• Catalogue level

  Piece

  Number not used

  Number not used

  Held by

  The National Archives, Kew

  Date

  Reference

  HW 8/25

• Catalogue level

  Piece

  Account of the methods used for breaking German teleprinter cypher messages

  Account of the methods used for breaking German teleprinter cypher messages

  Held by

  The National Archives, Kew

  Date

  1941 June 01-1945 June 30

  Reference

  HW 25/4

• Catalogue level

  Piece

  MGB (Soviet Ministry of State Security) Traffic: Moscow from New York, USA. (Described...

  MGB (Soviet Ministry of State Security) Traffic: Moscow from New York, USA. (Described at item level)

  Held by

  The National Archives, Kew

  Date

  1944 Aug 1-1944 Dec 28

  Reference

  HW 15/25

• Catalogue level

  Piece

  Japanese naval decrypts

  Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Jul 14-1943 Jul 21

  Reference

  HW 23/25

• Catalogue level

  Piece

  21288-22588

  21288-22588

  Held by

  The National Archives, Kew

  Date

  1942 Mar 01-1942 Mar 16

  Reference

  HW 19/25

• Catalogue level

  Piece

  GAF Recce and bombing operations

  GAF Recce and bombing operations

  Held by

  The National Archives, Kew

  Date

  1944 Mar 19-1945 Mar 28

  Reference

  HW 13/25

• Catalogue level

  Piece

  Verbatim German language texts issued as BP daily reports: all messages in GP Code...

  Verbatim German language texts issued as BP daily reports: all messages in GP Code No 3, including all intercepted messages in this code to/from concentration camps;

  Held by

  The National Archives, Kew

  Date

  1943 Apr-June

  Reference

  HW 16/25